Volume surge on Mac

Last week I updated my MAC to the latest version of the operating system. When I open a track using the MAC built-in audio, volume goes to full blast. If I lower the volume and close the track and open another, it defaults to full volume again. This never happened before. This only happens when I’m using built-in audio. It doesn’t happen when my preamp is connected. Sometimes I work on tracks outside of my studio and I don’t have my preamps. I tried to find a way to make an adjustment in system preferences, but nothing worked. I’m not sure how to fix this. If anyone has experienced this and has a solution your help is appreciated.